From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AAA77CA0FFE for ; Tue, 2 Sep 2025 05:33:48 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1utJde-0002i7-2P; Tue, 02 Sep 2025 01:33:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1utJdV-0002cO-Dw; Tue, 02 Sep 2025 01:32:54 -0400 Received: from gandalf.ozlabs.org ([150.107.74.76] helo=mail.ozlabs.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1utJdT-0000NR-Fh; Tue, 02 Sep 2025 01:32:53 -0400 Received: from mail.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3]) by gandalf.ozlabs.org (Postfix) with ESMTP id 4cGDsY0qxtz4wB0; Tue, 2 Sep 2025 15:32:49 +1000 (AEST) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mail.ozlabs.org (Postfix) with ESMTPSA id 4cGDsT0zMKz4w9s; Tue, 2 Sep 2025 15:32:44 +1000 (AEST) Message-ID: <3ca1ebf4-ad70-4738-b96c-41f5d8abfe31@kaod.org> Date: Tue, 2 Sep 2025 07:32:44 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [SPAM] [PATCH v5 07/10] hw/misc/aspeed_sbc: Add CAMP2 support for OTP data reads To: Kane Chen , Peter Maydell , Steven Lee , Troy Lee , Jamin Lin , Andrew Jeffery , Joel Stanley , "open list:ASPEED BMCs" , "open list:All patches CC here" Cc: troy_lee@aspeedtech.com References: <20250812094011.2617526-1-kane_chen@aspeedtech.com> <20250812094011.2617526-8-kane_chen@aspeedtech.com> From: =?UTF-8?Q?C=C3=A9dric_Le_Goater?= Content-Language: en-US, fr Autocrypt: addr=clg@kaod.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=150.107.74.76; envelope-from=SRS0=Sj0j=3N=kaod.org=clg@ozlabs.org; helo=mail.ozlabs.org X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.001, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 8/12/25 11:40, Kane Chen wrote: > From: Kane-Chen-AS > > The OTP space contains three types of entries: data, conf, and strap. > Data entries consist of two DWORDs, while the other types contain > only one DWORD. This change adds the R_CAMP2 register (0x024 / 4) to > store the second DWORD when reading from the OTP data region. > > With this enhancement, OTP reads now correctly return both DWORDs for > data entries via the CAMP registers, along with improved address > validation and error handling. > > Signed-off-by: Kane-Chen-AS Reviewed-by: Cédric Le Goater Thanks, C. > --- > hw/misc/aspeed_sbc.c | 27 +++++++++++++++++++++++++++ > 1 file changed, 27 insertions(+) > > diff --git a/hw/misc/aspeed_sbc.c b/hw/misc/aspeed_sbc.c > index 052c70fd42..787e2d0489 100644 > --- a/hw/misc/aspeed_sbc.c > +++ b/hw/misc/aspeed_sbc.c > @@ -22,6 +22,7 @@ > #define R_ADDR (0x010 / 4) > #define R_STATUS (0x014 / 4) > #define R_CAMP1 (0x020 / 4) > +#define R_CAMP2 (0x024 / 4) > #define R_QSR (0x040 / 4) > > /* R_STATUS */ > @@ -50,6 +51,8 @@ > #define SBC_OTP_CMD_READ 0x23b1e361 > #define SBC_OTP_CMD_PROG 0x23b1e364 > > +#define OTP_DATA_DWORD_COUNT (0x800) > +#define OTP_TOTAL_DWORD_COUNT (0x1000) > static uint64_t aspeed_sbc_read(void *opaque, hwaddr addr, unsigned int size) > { > AspeedSBCState *s = ASPEED_SBC(opaque); > @@ -72,6 +75,16 @@ static bool aspeed_sbc_otp_read(AspeedSBCState *s, > MemTxResult ret; > AspeedOTPState *otp = &s->otp; > uint32_t value, otp_offset; > + bool is_data = false; > + > + if (otp_addr < OTP_DATA_DWORD_COUNT) { > + is_data = true; > + } else if (otp_addr >= OTP_TOTAL_DWORD_COUNT) { > + qemu_log_mask(LOG_GUEST_ERROR, > + "Invalid OTP addr 0x%x\n", > + otp_addr); > + return false; > + } > > otp_offset = otp_addr << 2; > ret = address_space_read(&otp->as, otp_offset, MEMTXATTRS_UNSPECIFIED, > @@ -85,6 +98,20 @@ static bool aspeed_sbc_otp_read(AspeedSBCState *s, > s->regs[R_CAMP1] = value; > trace_aspeed_sbc_otp_read(otp_addr, value); > > + if (is_data) { > + ret = address_space_read(&otp->as, otp_offset + 4, > + MEMTXATTRS_UNSPECIFIED, > + &value, sizeof(value)); > + if (ret != MEMTX_OK) { > + qemu_log_mask(LOG_GUEST_ERROR, > + "Failed to read OTP memory, addr = %x\n", > + otp_addr); > + return false; > + } > + s->regs[R_CAMP2] = value; > + trace_aspeed_sbc_otp_read(otp_addr + 1, value); > + } > + > return true; > } >